參數(shù)資料
型號(hào)： TMS320GB
廠商： Texas Instruments, Inc.
英文描述： Adjustable 1.24-16V ±0.5% Tolerance, 0.05-20mA Shunt Regulator; Package: TO-92 (TO-226) 5.33mm Body Height; No of Pins: 3; Container: Tape and Reel; Qty per Container: 2000
中文描述： 第二代數(shù)字信號(hào)處理器
文件頁數(shù)： 31/123頁
文件大?。?/td> 1205K
代理商： TMS320GB
www.ti.com
3.2.10
Peripheral Interrupt Expansion (PIE) Block
3.2.11
External Interrupts (XINT1, XINT2, XNMI)
3.2.12
Oscillator and PLL
3.2.13
Watchdog
3.2.14
Peripheral Clocking
3.2.15
Low-Power Modes
TMS320F2808, TMS320F2806
TMS320F2801, UCD9501
Digital Signal Processors
SPRS230F–OCTOBER 2003–REVISED SEPTEMBER 2005
The PIE block serves to multiplex numerous interrupt sources into a smaller set of interrupt inputs. The
PIE block can support up to 96 peripheral interrupts. On the 280x, 43 of the possible 96 interrupts are
used by peripherals. The 96 interrupts are grouped into blocks of 8 and each group is fed into 1 of 12
CPU interrupt lines (INT1 to INT12). Each of the 96 interrupts is supported by its own vector stored in a
dedicated RAM block that can be overwritten by the user. The vector is automatically fetched by the CPU
on servicing the interrupt. It takes 8 CPU clock cycles to fetch the vector and save critical CPU registers.
Hence the CPU can quickly respond to interrupt events. Prioritization of interrupts is controlled in
hardware and software. Each individual interrupt can be enabled/disabled within the PIE block.
The 280x supports three masked external interrupts (XINT1, XINT2, XNMI). XNMI can be connected to
the INT13 or NMI interrupt of the CPU. Each of the interrupts can be selected for negative, positive, or
both negative and positive edge triggering and can also be enabled/disabled (including the XNMI). The
masked interrupts also contain a 16-bit free running up counter, which is reset to zero when a valid
interrupt edge is detected. This counter can be used to accurately time stamp the interrupt. Unlike the
281x devices, there are no dedicated pins for the external interrupts. Rather, any Port A GPIO pin can be
configured to trigger any external interrupt.
The 280x can be clocked by an external oscillator or by a crystal attached to the on-chip oscillator circuit.
A PLL is provided supporting up to 10 input-clock-scaling ratios. The PLL ratios can be changed on-the-fly
in software, enabling the user to scale back on operating frequency if lower power operation is desired.
Refer to the Electrical Specification section for timing details. The PLL block can be set in bypass mode.
The 280x devices contain a watchdog timer. The user software must regularly reset the watchdog counter
within a certain time frame; otherwise, the watchdog will generate a reset to the processor. The watchdog
can be disabled if necessary.
The clocks to each individual peripheral can be enabled/disabled so as to reduce power consumption
when a peripheral is not in use. Additionally, the system clock to the serial ports (except eCAN) and the
ADC blocks can be scaled relative to the CPU clock. This enables the timing of peripherals to be
decoupled from increasing CPU clock speeds.
The 280x devices are full static CMOS devices. Three low-power modes are provided:
IDLE:
Place CPU into low-power mode. Peripheral clocks may be turned off selectively and only
those peripherals that need to function during IDLE are left operating. An enabled interrupt
from an active peripheral or the watchdog timer will wake the processor from IDLE mode.
Turn off clock to CPU and peripherals. This mode leaves the oscillator and PLL functional.
An external interrupt event will wake the processor and the peripherals. Execution begins
on the next valid cycle after detection of the interrupt event
Turn off oscillator. This mode basically shuts down the device and places it in the lowest
possible power consumption mode. A reset or external signal can wake the device from
this mode.
STANDBY:
HALT:
Functional Overview
31
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PDF描述
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TMS320-JTAG 功能描述:仿真器/模擬器 DSP JTAG FOR PROG & EMULATION RoHS:否 制造商:Blackhawk 產(chǎn)品:System Trace Emulators 工具用于評(píng)估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2
TMS320-JTAG-USB 功能描述:JTAG調(diào)試器 DSP USB JTAG FOR XDS100 SOFTWARE RoHS:否 制造商:Olimex Ltd. 產(chǎn)品:JTAG In-Circuit Debuggers 工具用于評(píng)估:MSP430 Flash MCUs 用于:MSP430 Kick Start, MSPGCC 核心:MSP430 接口類型:JTAG, USB 工作電源電壓:12 V
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TMS320LBC51PZ 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:
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